The Flash Referenced A Major Batman Villain Last Night

Now that we know Batman exists within the Arrowverse – albeit as someone who’s been missing for three years – it seems like the producers behind these shows are free to drop references to his supporting characters following the incredible “Elseworlds” crossover. In fact, The Flash‘s midseason premiere even contained a Batmobile Easter egg.

If you tuned in for last night’s episode, “Memorabilia,” then you were witness to one of the Dark Knight’s craziest foes being name-dropped. But if you didn’t, we’ll sum up the details for you right now.

Basically, when Sherloque Wells introduced the technology capable of entering somebody’s mind to Team Flash, he revealed that it also aided him in his past battle with Jervis Tetch AKA the Mad Hatter – and on Earth-221, no less. I guess now that the concept of infinite Earths has been introduced, the producers are no longer limiting their scope to just 53.

Of course, we can’t meet the Mad Hatter in the Arrowverse just yet because the character’s still tied up over on Fox’s Gotham. But seeing as how that show’s in its final season, I’d think Tetch will be fair game for the Batwoman TV series once it presumably launches in the fall. And if that’s the case, we’ll probably meet his Earth-1 counterpart.

For more on what the immediate future holds for the Scarlet Speedster’s own saga, be sure to check out the official synopsis for next week’s episode, “Goldfaced”:

BARRY AND IRIS EACH TAKE DANGEROUS STEPS TO STOP CICADA — Barry (Grant Gustin) and Ralph (Hartley Sawyer) must go undercover as criminals in an illegal black market to purchase a device that could help them stop Cicada (Chris Klein). Once inside, Barry and Ralph find their morality tested as they slip deeper into the criminal world, eventually having to choose between committing a crime, or losing the means to defeat one of their greatest foes. Meanwhile, Iris (Candice Patton) investigates a lead on Cicada’s whereabouts and ends up in a dangerous situation. Alexandra LaRoche directed the episode written by Jonathan Butler & Gabriel Garza (#513).

The Flash airs on Tuesday nights on The CW.